import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

Vue.use(VueRouter)

const routes = [
  {path:'/',redirect:'/login'},
  {path:'/login',component:Login},
  {path:'/home',component:Home}
]

const router = new VueRouter({
  routes
})


// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to   将要访问的路径
  // from 代表从按个路径跳转而来
  // next 是一个函数, 表示放行
  //      next() 放行  next('/login') 强行跳转
  if (to.path === '/login') {
    return next()
  }
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) {
    return next('/login')
  }
  next()
})


export default router
